model 20 hum (detector circuit?)

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model 20 hum (detector circuit?)

Tubesforme
Member

Posts: 107
Threads: 20
Joined: Feb 2015
City: Los Angeles, CA

#33

10-28-2015, 12:12 PM

(10-27-2015, 11:25 PM)Steve Davis Wrote: In an earlier post mikethedruid asked if you have checked the ground on condenser 14. Have you done that? Also, check the value of that condenser and resistor 18.

Steve

Yes, yes and yes. First things that I did before even posting this request. I also changed both parts out with known NOS good parts. All grounds have been tried with jumper clips and none changed the hum.

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Messages In This Thread

model 20 hum (detector circuit?) - by Tubesforme - 10-19-2015, 12:11 PM

RE: model 20 hum (detector circuit?) - by Steve Davis - 10-19-2015, 02:40 PM

RE: model 20 hum (detector circuit?) - by OZ4 - 10-19-2015, 05:23 PM

RE: model 20 hum (detector circuit?) - by Steve Davis - 10-19-2015, 06:03 PM

RE: model 20 hum (detector circuit?) - by OZ4 - 10-20-2015, 09:01 AM

RE: model 20 hum (detector circuit?) - by mikethedruid - 10-24-2015, 06:04 PM

RE: model 20 hum (detector circuit?) - by Tubesforme - 10-24-2015, 08:24 PM

RE: model 20 hum (detector circuit?) - by Tubesforme - 10-27-2015, 02:58 PM

RE: model 20 hum (detector circuit?) - by Alan Douglas - 10-24-2015, 06:23 PM

RE: model 20 hum (detector circuit?) - by mikethedruid - 10-24-2015, 10:48 PM

RE: model 20 hum (detector circuit?) - by Tubesforme - 10-29-2015, 05:21 PM

RE: model 20 hum (detector circuit?) - by Steve Davis - 10-24-2015, 11:01 PM

RE: model 20 hum (detector circuit?) - by Tubesforme - 10-24-2015, 11:46 PM

RE: model 20 hum (detector circuit?) - by Tubesforme - 10-28-2015, 07:14 PM

RE: model 20 hum (detector circuit?) - by Tubesforme - 10-30-2015, 06:30 PM

RE: model 20 hum (detector circuit?) - by OZ4 - 10-25-2015, 09:57 AM

RE: model 20 hum (detector circuit?) - by Tubesforme - 10-25-2015, 11:40 AM

RE: model 20 hum (detector circuit?) - by OZ4 - 10-25-2015, 10:39 AM

RE: model 20 hum (detector circuit?) - by Kenneth F. Besso Jr. - 10-25-2015, 07:01 PM

RE: model 20 hum (detector circuit?) - by morzh - 10-25-2015, 10:08 PM

RE: model 20 hum (detector circuit?) - by Steve Davis - 10-26-2015, 07:38 AM

RE: model 20 hum (detector circuit?) - by OZ4 - 10-26-2015, 09:18 AM

RE: model 20 hum (detector circuit?) - by Tubesforme - 10-26-2015, 11:14 PM

RE: model 20 hum (detector circuit?) - by OZ4 - 10-26-2015, 09:34 AM

RE: model 20 hum (detector circuit?) - by OZ4 - 10-26-2015, 10:24 AM

RE: model 20 hum (detector circuit?) - by Tubesforme - 10-26-2015, 11:12 PM

RE: model 20 hum (detector circuit?) - by OZ4 - 10-27-2015, 07:43 PM

RE: model 20 hum (detector circuit?) - by Tubesforme - 10-27-2015, 10:38 PM

RE: model 20 hum (detector circuit?) - by Steve Davis - 10-27-2015, 11:25 PM

RE: model 20 hum (detector circuit?) - by Tubesforme - 10-28-2015, 12:12 PM

RE: model 20 hum (detector circuit?) - by Ron Ramirez - 10-28-2015, 01:34 PM

RE: model 20 hum (detector circuit?) - by Tubesforme - 10-28-2015, 07:07 PM

RE: model 20 hum (detector circuit?) - by OZ4 - 10-28-2015, 10:52 AM

RE: model 20 hum (detector circuit?) - by Tubesforme - 10-28-2015, 12:08 PM

RE: model 20 hum (detector circuit?) - by Tubesforme - 10-29-2015, 06:50 PM

RE: model 20 hum (detector circuit?) - by OZ4 - 10-28-2015, 02:36 PM

RE: model 20 hum (detector circuit?) - by Tubesforme - 10-28-2015, 07:03 PM

RE: model 20 hum (detector circuit?) - by Ron Ramirez - 10-28-2015, 08:10 PM

RE: model 20 hum (detector circuit?) - by radiohenry - 10-29-2015, 06:31 PM

RE: model 20 hum (detector circuit?) - by Tubesforme - 10-29-2015, 06:44 PM

RE: model 20 hum (detector circuit?) - by LASJayhawk - 10-29-2015, 06:57 PM

RE: model 20 hum (detector circuit?) - by Tubesforme - 10-29-2015, 09:10 PM

RE: model 20 hum (detector circuit?) - by Tubesforme - 10-30-2015, 06:21 PM

RE: model 20 hum (detector circuit?) - by LASJayhawk - 10-29-2015, 09:36 PM

RE: model 20 hum (detector circuit?) - by Tubesforme - 10-30-2015, 12:28 PM

RE: model 20 hum (detector circuit?) - by LASJayhawk - 10-30-2015, 02:29 PM

RE: model 20 hum (detector circuit?) - by Tubesforme - 10-30-2015, 02:34 PM

RE: model 20 hum (detector circuit?) - by klondike98 - 10-30-2015, 03:24 PM

RE: model 20 hum (detector circuit?) - by OZ4 - 10-30-2015, 05:13 PM

RE: model 20 hum (detector circuit?) - by Tubesforme - 10-30-2015, 06:04 PM

RE: model 20 hum (detector circuit?) - by OZ4 - 10-31-2015, 09:40 AM

RE: model 20 hum (detector circuit?) - by Tubesforme - 10-31-2015, 01:06 PM

RE: model 20 hum (detector circuit?) - by Ron Ramirez - 11-08-2015, 09:28 PM

RE: model 20 hum (detector circuit?) - by Tubesforme - 11-09-2015, 07:11 PM

RE: Low continual hum in model 21 - by Steve Davis - 10-23-2015, 09:34 PM

RE: Low continual hum in model 21 - by Tubesforme - 10-23-2015, 10:19 PM

RE: Low continual hum in model 21 - by Steve Davis - 10-23-2015, 11:01 PM

RE: model 20 hum (detector circuit?) - by Tubesforme - 10-24-2015, 05:50 PM

Need correct voltages for det and af model 20 - by Tubesforme - 11-07-2015, 04:54 PM

RE: Need correct voltages for det and af model 20 - by morzh - 11-08-2015, 11:09 AM

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